Interlocking concrete masonry block



FIG. 1 is a perspective view of an interlocking concrete masonry block showing my new design;

FIG. 2 is an end view thereof;

FIG. 3 is a front view thereof; and,

FIG. 4 is a top view thereof.

The broken lines in the drawing views are included for the purpose of illustrating a portion of the interlocking concrete masonry block that forms no part of the claimed design. 

CLAIM I claim the ornamental design for an interlocking concrete masonry block, as shown and described. 